A. mechanical advantage is greater than velocity ratio
B. mechanical advantage is equal to velocity ratio
C. mechanical advantage is less than velocity ratio
D. mechanical advantage is unity
✅ The correct answer is option C.
Civil Engineering
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2422. Center of gravity of a thin hollow cone lies on the axis at a height of________________?
A. one-fourth of the total height above base
B. one-third of the total height above base
C. one-half of the total height above base
D. three-eighth of the total height above the base
✅ The correct answer is option B.
2423. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be___________________?
A. maximum
B. minimum
C. zero
D. infinity
✅ The correct answer is option C.
2424. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly________________?
A. 38 m
B. 62.5 m
C. 96 m
D. 124 m
✅ The correct answer is option B.
2425. According to law of triangle of forces______________?
A. three forces acting at a point will be in equilibrium
B. three forces acting at a point can be represented by a triangle, each side being proportional to force
C. if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
✅ The correct answer is option C.
2426. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?
A. same
B. double
C. half
D. four times
✅ The correct answer is option B.
2427. On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?
A. towards the wall at its upper end
B. away from the wall at its upper end
C. upwards at its upper end
D. downwards at its upper end
✅ The correct answer is option C.
2428. The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?
A. limiting friction
B. sliding friction
C. rolling friction
D. kinematic friction
✅ The correct answer is option A.
2429. Forces are called coplanar when all of them acting on body lie in________________?
A. one point
B. one plane
C. different planes
D. perpendicular planes
✅ The correct answer is option B.
2430. If n = number of members andy = number of joints, then for a perfect frame, n =_______________?
A. j-2
B.2j-l
C. 2/-3
D.3/-2
✅ The correct answer is option C.